I'm afraid I have no hard opinion on the frontside/backside grill block. Personally, I would put it on the front, as I just don't have that much faith in the 'stagnant air bubble' theory. If you hold a Dixie cup in a stream of air, which way pushes harder-open end forward, or open end back? I would love to see some documentation if someone has researched anything similar to this. Maybe someone could tell us if Hucho has an opinion in his book.
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-Terry
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